/Engine/Plugins/Experimental/RemoteSession/Source/RemoteSession/Public/Channels/RemoteSessionARSystemChannel.h
Trace all the tracked geometries and determine which have been hit by a ray cast fromScreenCoord_. Only geometries specified inTraceChannels_ are considered.
a list of all the geometries that were hit, sorted by distance
virtual [TArray](API\Runtime\Core\Containers\TArray)< [FARTraceResult](API\Runtime\AugmentedReality\FARTraceResult) > OnLineTraceTrackedObjects ( const FVector2D ScreenCoord, EARLineTraceChannels TraceChannels )